Table 3-2:  Shipment Characteristics by Total Modal Activity for the United States: 2002 (Commodity Flow Survey data),,,,,,,
Mode of transportation 1,Ton-miles 3,,Average miles per shipment,,,,
,Number (millions),Percent ,,,,,
Total,"3,204,410",100.0, 575 ,,,,
    Truck,"1,318,383",41.1, 191 ,,,,
    Rail,"1,275,195",39.8, 975 ,,,,
    Shallow draft,"271,371",8.5, 496 ,,,,
    Great Lakes,"50,490",1.6, 491 ,,,,
    Deep draft,"110,919",3.5," 1,517 ",,,,
    Air,"5,388",0.2," 1,771 ",,,,
"    Parcel, U.S. Postal Service, or courier","20,536",0.6, 910 ,,,,
    Pipeline 2,S,S, S ,,,,
    Other and unknown modes,"76,587",2.4, 153 ,,,,
"1 Estimates represent activity for a given mode across single and multiple mode shipments.  For example, ""Truck"" ton-miles includes total ton-miles for shipments moving only by truck plus ton-miles for truck segments of multiple mode shipments.    ",,,,,,,
2 Estimates for pipeline exclude shipments of crude petroleum.  ,,,,,,,
3 Ton-miles estimates are based on estimated distance traveled along a modeled transportation network.  ,,,,,,,
KEY: S = withheld due to high sampling variability or poor response quality.,,,,,,,
"NOTES: The data presented in these tables exclude shipments from the following establishments classified in the North American Industry Classification System (NAICS) as: farms, forestry, logging, fisheries, construction, publishing, and crude petroleum production; households; governments; and most retail and service businesses.  Also excluded are most imports and commodities shipped from a foreign location to another foreign destination that pass through the United States.  Estimates are preliminary and may be revised.  ",,,,,,,
"SOURCE:  U.S. Department of Transportation, Bureau of Transportation Statistics and U.S. Department of Commerce, U.S. Census Bureau, 2002 Commodity Flow Survey: United States Preliminary Report, Washington, DC: December 2003.",,,,,,,